depends what you are trrying to do… I have honeywell, and their professional prestige is very nice
i have sensors in all the ducts and it alerts me if ther e is an issue in performance and also outdoor sensor.
As far as i know this is one of the best to also control a whole house steam humidifer… Their own integration is nice and their app is good.
That being said their Smarthings integration sucks!. Not only did they block our 3rd party integration which was great and also had many morer features than their official integration (ie outdoor temp, humitdity etc)
They now broke the official integration it no longer shows operating state for anyone… They keep blaming it on one issue or another but it is broken. I only use it to monitor temps which is reliable.